Well-drilling tool



F. H. CLORE.

WELL DRILLING TOOL.

APPLlCATlON FILED 050.29, 1919.

1 373,,996. Patented Apr. 5, 1921.

UNITED STATES FRANKLIN H. GLOBE, OF LIVINGSTON, TEXAS.

WELL-DRILLING TOOL.

Specification of Letters Patent.

-A pp1ication filed December 29, 1919. Serial No. 348,146. I

To all whom it may concern:

Be it known that I, FRANKLIN I-I. GLOBE,

a citizen of the United States of America,

and resident of Livingston, in the county of Polk and State of Texas,have invented certain new and useful Improvements in Well- DrillingTools, of which the following is a specification.

This invention relates to well drilling tools and particularly to a bitadapted for use as a rotary tool, the said device having means forattachment to a rotary member and for supplying fluid to the cuttingedges of the bit for preventing the accumulation of mud thereon.

An object of this invention is to provide novel means which will supplyfluid to the cutting sides of the bit and whereby the full force ofwater will reach the cutting side only; so asto insure the dislodgmentof mud and the proper cleaning of the bit so that the mud will notinterfere with the cutting action of the tool. i

A further object of this invention is to provide atool, the cuttingsides of which are slightly curved and wherein ports are provided forthe flow of fluid so that the fluid will impinge the accumulations whichmay be present on the cutting surfaces of the .bit.

With the foregoing and other objects in View, the invention consists inthe details of construction, and in the arrangement and combination ofparts to be hereinafter more fully set forth and claimed.

In describing the invention in detail, reference will be had to theaccompanying drawings forming part of this specification wherein likecharacters denote corresponding parts in the several views, and inwhich- Figure 1 illustrates a view in elevation of a bit embodying theinvention;

Fig. 2 illustrates an edge view thereof;

and t Fig. 3 illustrates a section on the line 33 of Fig.1.

In these drawings 5 ,denotes the head of the bitv having an upwardlyextended threaded shank 6 and blades or cutting ed es 7 and 8 which areoppositely extended.

rom the shank to the point of divergence of the cutting edges, thebithas concavlties 9 and 10, one on one sideand one on the other side ofthe bit and ofi'set with relation to the transverse center of the bit.The surface of each cutting side of the bit is curved as shown at 11 anda port 12 extends through the shank 6 on each 'side of the transversecenter and discharges at the top of the curved [portion of the bit sothat fluids forced through the port will impinge any mud or accumulationon the bit and dislodge it. The ports are restricted in area for thereason that it is the desire of the inventor that the fluid passingtherethrough will be in the nature of a spray or fine stream havingconsiderable force, and the location of these ducts or orifices is ofimportance since they are so placed as to cause the water to utilize thefront surfaces of the tool, or bit, as a resistance while the fluid isoperating on the deposit to displace it.

I have shown this device without great regard to proportions as tolength, thickness or breadth, it being understood that the device willbe made proportionate to the size of the hole to be bored and thematerial to Patented Apr. 5, I921.-

be worked, and it is believed that one skilled in the art will acquire acomprehensive disclosureflwhich will enable him to carry the inventioninto practice.

I claim 1. In a well bit, a body having a threaded shank with portsextending longitudinally therein on opposite sides of the longitudinalaxis of the said shank, the said bodyhavin concavities in each faceoppositely dispose on opposite sides of the longitudinal axis, thesurfaces of the concavities being curved and the cutting edges of thebit being curved, the said cutting edges extending oppositely.

2. In a well bit, a body portion having a shank with apertures thereinextending lon-" gitudinally, one on each side of the longitudinal axisof the shank, the saidbodyhaving recesses the walls of which areconcaved, the

said apertures communicating1 with the recessed portions of the bit at te inner edges of the recesses, the said .bit having -oppositelyextending cutting edges. FRANKLI H. oLoRE'.

